Comment 39 for bug 762918

I think it may also have something to do with the screen locking: I had my laptop sitting, screensaver disabled via the screen saver control panel and in both the AC and battery profiles (the machine was running on AC power at the time), and I was running the Transmission bittorrent client. I opened the screen after about 5 minutes of it being closed (and it has been running continuously all day with me periodically opening the lid to check email and whatnot), and though it seemed to be responding, the mouse pointer and the whole screen seemed to flicker. That is, until I entered my password as if to unlock the screen, and then things went back to normal.

In a previous posting I made above I did notice a behavior similar to this before when the screen flickered between the screen saver and the lock screen.